Open interest
The number of option contracts outstanding for a given strike and expiration.
Where it is explained in full
Options from the beginning: calls, puts, and the Greeks in plain words. What a contract actually is, what the numbers on the screen mean, and why an option's value before expiration is not the same as its payoff at expiration.
A definition says what a thing is; it never says whether it fits you. The guides explain how it works and name the professional who confirms it for a particular person. The No Advice Disclosure.
Words beside it
- Accrued interest
Interest a bond has earned since its last payment; a buyer pays it to the seller on top of the price.
- compound interest
When the money you earn from savings or investments starts earning its own money on top of itself over time. The longer you leave it alone the faster it tends to grow.
- interest
Interest is money paid to you for letting someone else use your money, or money you owe when you borrow from someone else. When you buy a bond you are the lender so the borrower pays you interest on a regular schedule.
- Interest rate risk
The chance a bond's price falls because rates rose.
- open enrollment
A set period of time each year when you are allowed to sign up for or make changes to benefits like health insurance. Outside of this window you generally cannot make changes unless you have a major life event like losing a job.
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